There's another reason to farm here not listed in this video: In patch 3.2.2 the drums that you can create (aimed at providing raids with buffs which might be missing from certain setups) take jormunga scales! This is by far the best place to farm them if you take a detour into the cave north of where this was filmed. Simply kill both mammoth packs, do the cave, then come out and do the mammoths again. We managed to get about one artic fur per 10 minutes chain pulling like this but the real money was in leather, meats, and greens.